Description | Boxes | Hydrodynamic | Water Quality | Conclusions

WATER QUALITY RESULTS

Trophic Level in Estuary

 

For three zones defined according to salinity distributions, was calculated the cumulative frequencies for Clorophyll a , in order to classified the trofic activity in estuary:

Seawater zone

Mixing zone

Tidal Freswater zone

 

 

Annual Budgets per Zone in Estuary

 

The boxes method, allow as to calculate the exchanges between boxes  for several properties. Next, is represented annual budgets per zone in estuary for phytoplankton, ammonia and nitrate:

Phytoplankton

Ammonia

Nitrate

 

 

Limiting Factors of Phytoplankton Growth

 

Limitation factors for phytoplankton growth are computed by MOHID system wich result is 0 when the limitation is maximal (there are no conditions for phytoplankton growth) and 1 when there is no limitation and phytoplankton growth rate is the optimal value.

Total Limitation Factors

Animations

Reference Situation

   PhytoplanktonAmmoniaNitrateOxygen
 

Influence of the Nitrate Removal by Agriculture Systems

    PhytoplanktonAmmoniaNitrateOxygen
 

Effects of Nutrients Removal by WWTP

    PhytoplanktonAmmoniaNitrateOxygen